Project list

Jejer (croatian: Đejđer)

Init

Time:

19.12.2005 7:34:50PM

Description:

Đejđer is actually ĐSM pager. (Obviously, it's part of the ĐSM project)
It is designed to be as simplest as possesible and to receive ĐSMsm (short messages).
It's possesible to send messages, but it's very hard to write messages with only 4 keys (the fifth is power). And there is limit of only 20 chars...
This protutype has big problems with transceiver, probably because it isn't shielded and is too close to CPU (source of many hums), so it has range of about 25 inches or maybe less.

It's presented on first VIP Eureka as ĐSM project (read more in project ĐSM).

Schematics:

Power supply

Motherboard

Keyboard

Power supply for transceiver

Receiver

Transmitter

Pictures:

LCD is a bit modofied, so backlight doesen't consume too much power.

Transceiver is almost whole assembled in SMD. That antenna appeared to be very bad.

They really had to take this picture... It's a second before i figured out that Đejđer won't receive message because PC's transmitter isn't connected... :)

We two autors...

Related projects:

• JSM (croatian: ĐSM)

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